Documents required for re-entry to the United States
Documents that are recommended that may be requested at the port-of-entry
These documents should be printed and in hand. You will most likely not be able to consult an electronic device to verify this information.
Upon your return to the U.S., ISE recommends that you retrieve and print your I-94. Verify the information is correct, your status is F-1 and your admit until date is D/S. Keep this for your records. It is not needed by ISE unless specifically requested.